Carbon tetracoride $($CCl$4.)$ is diffused through nitrogen in a single direction at atmospheric pressure and $0\backslash$deg C$.$ The molar fraction of Cl$,$ at point A $($Interphase$)$ is $0\mathrm{.}45$; at point B $($within the nitrogen current$),$ separated $1\mathrm{.}5$ m in the direction of diffusion, its molar fraction $($mol$)$ is $0\mathrm{.}02.$ The Dv diffusivity is $0\mathrm{.}26$ f$/$h$.$ The gaseous phase as a whole is stationary, that is$,$ nitrogen is diffused at the same speed as theCarbon tetralide but in the opposite direction. $($Remember $1$ m$\text{'}=10\mathrm{.}76$ ft$)$